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A novel responsive stabilizing Janus nanosilica as a nanoplugging agent in water-based drilling fluids for exploiting hostile shale environments
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作者 Alain Pierre Tchameni Lv-Yan Zhuo +5 位作者 Lesly Dasilva Wandji Djouonkep Robert Dery Nagre Lu-Xin Chen Lin Zhao Chao Ma Bin-Qiang Xie 《Petroleum Science》 SCIE EI CAS CSCD 2024年第2期1190-1210,共21页
Thermo-responsive nanocomposites have recently emerged as potential nanoplugging agents for shale stabilization in high-temperature water-based drilling fluids(WBDFs). However, their inhibitory properties have not bee... Thermo-responsive nanocomposites have recently emerged as potential nanoplugging agents for shale stabilization in high-temperature water-based drilling fluids(WBDFs). However, their inhibitory properties have not been very effective in high-temperature drilling operations. Thermo-responsive Janus nanocomposites are expected to strongly interact with clay particles from the inward hemisphere of nanomaterials, which drive the establishment of a tighter hydrophobic membrane over the shale surface at the outward hemisphere under geothermal conditions for shale stabilization. This work combines the synergistic benefits of thermo-responsive and zwitterionic nanomaterials to synchronously enhance the chemical inhibitions and plugging performances in shale under harsh conditions. A novel thermoresponsive Janus nanosilica(TRJS) exhibiting zwitterionic character was synthesized, characterized,and assessed as shale stabilizer for WBDFs at high temperatures. Compared to pristine nanosilica(Si NP)and symmetrical thermo-responsive nanosilica(TRS), TRJS exhibited anti-polyelectrolyte behaviour, in which electrolyte ions screened the electrostatic attraction between the charged particles, potentially stabilizing nanomaterial in hostile shaly environments(i.e., up to saturated brine or API brine). Macroscopically, TRJS exhibited higher chemical inhibition than Si NP and TRS in brine, prompting a better capability to control pressure penetration. TRJS adsorbed onto the clay surface via chemisorption and hydrogen bonding, and the interactions became substantial in brine, according to the results of electrophoretic mobility, surface wettability, and X-ray diffraction. Thus, contributing to the firm trapping of TRJS into the nanopore structure of the shale, triggering the formation of a tight hydrophobic membrane over the shale surface from the outward hemisphere. The addition of TRJS into WBDF had no deleterious effect on fluid properties after hot-treatment at 190℃, implying that TRJS could find potential use as a shale stabilizer in WBDFs in hostile environments. 展开更多
关键词 Janus nanosilica Thermo-responsive copolymer Anti-polyelectrolyte effect Shale stabilizer Inhibition plugging drilling fluid
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Thermo-sensitive polymer nanospheres as a smart plugging agent for shale gas drilling operations 被引量:11
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作者 Wei-Ji Wang Zheng-Song Qiu +2 位作者 Han-Yi Zhong Wei-An Huang Wen-Hao Dai 《Petroleum Science》 SCIE CAS CSCD 2017年第1期116-125,共10页
Emulsifier-free poly(methyl methacrylate-styrene) [P(MMA-St)] nanospheres with an average particle size of 100 nm were synthesized in an isopropyl alcoholwater medium by a solvothermal method. Then, through radica... Emulsifier-free poly(methyl methacrylate-styrene) [P(MMA-St)] nanospheres with an average particle size of 100 nm were synthesized in an isopropyl alcoholwater medium by a solvothermal method. Then, through radical graft copolymerization of thermo-sensitive mono- mer N-isopropylacrylamide (NIPAm) and hydrophilic monomer acrylic acid (AA) onto the surface of P(MMA- St) nanospheres at 80 ℃, a series of thermo-sensitive polymer nanospheres, named SD-SEAL with different lower critical solution temperatures (LCST), were prepared by adjusting the mole ratio of NIPAm to AA. The products were characterized by Fourier transform infrared spectroscopy, transmission electron microscopy, thermogravimetric analysis, particle size distribution, and specific surface area analysis. The temperature-sensitive behavior was studied by light transmittance tests, while the sealing performance was investigated by pressure transmission tests with Lungmachi Formation shales. The experimental results showed that the synthesized nanoparticles are sensitive to temperature and had apparent LCST values which increased with an increase in hydrophilic monomer AA. When the temperature was higher than its LCST value, SD- SEAL played a dual role of physical plugging and chemical inhibition, slowed down pressure transmission, and reduced shale permeability remarkably. The plugged layer of shale was changed to being hydrophobic, which greatly improved the shale stability 展开更多
关键词 Nanoparticle plugging agent Polymermicrospheres Thermo-sensitive polymer Wellborestability - Shale gas - drilling fluid
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A high-temperature resistant and high-density polymeric saturated brine-based drilling fluid 被引量:1
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作者 HUANG Xianbin SUN Jinsheng +3 位作者 LYU Kaihe DONG Xiaodong LIU Fengbao GAO Chongyang 《Petroleum Exploration and Development》 SCIE 2023年第5期1215-1224,共10页
Three high-temperature resistant polymeric additives for water-based drilling fluids are designed and developed:weakly cross-linked zwitterionic polymer fluid loss reducer(WCZ),flexible polymer microsphere nano-pluggi... Three high-temperature resistant polymeric additives for water-based drilling fluids are designed and developed:weakly cross-linked zwitterionic polymer fluid loss reducer(WCZ),flexible polymer microsphere nano-plugging agent(FPM)and comb-structure polymeric lubricant(CSP).A high-temperature resistant and high-density polymeric saturated brine-based drilling fluid was developed for deep drilling.The WCZ has a good anti-polyelectrolyte effect and exhibits the API fluid loss less than 8 mL after aging in saturated salt environment at 200°C.The FPM can reduce the fluid loss by improving the quality of the mud cake and has a good plugging effect on nano-scale pores/fractures.The CSP,with a weight average molecular weight of 4804,has multiple polar adsorption sites and exhibits excellent lubricating performance under high temperature and high salt conditions.The developed drilling fluid system with a density of 2.0 g/cm^(3)has good rheological properties.It shows a fluid loss less than 15 mL at 200°C and high pressure,a sedimentation factor(SF)smaller than 0.52 after standing at high temperature for 5 d,and a rolling recovery of hydratable drill cuttings similar to oil-based drilling fluid.Besides,it has good plugging and lubricating performance. 展开更多
关键词 deep drilling saturated brine-based drilling fluid high-temperature resistant additive water-based drilling fluid rheological property plugging performance lubricating performance
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Research on High Temperature and High Density White Oil Based Drilling Fluid and Its Application in Well 201H7-6 被引量:3
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作者 Bobo Qin Yidi Wang +1 位作者 Chunzhi Luo Gang Liu 《Open Journal of Yangtze Oil and Gas》 2019年第3期174-182,共9页
As the depth and horizontal length of shale gas development wells increase,the requirement for the temperature resistance and the ability of the drilling fluids to stabilize the shale formation becomes higher.A new ty... As the depth and horizontal length of shale gas development wells increase,the requirement for the temperature resistance and the ability of the drilling fluids to stabilize the shale formation becomes higher.A new type of high temperature and high density white oil based drilling fluid system has been developed in laboratory.Research shows that the drilling fluid system has good rheological property,low filtration loss,strong anti-debris pollution capability and good plugging performance at high temperature and high density.The system has been successfully applied in the 201H7-6 well.Application results show that the drilling fluid rheology,high temperature and high pressure fluid loss and demulsification voltage meet the field requirements.The drilling fluid performance is stable in drilling an 1800 m horizontal section,and no stuck or shale swelling and wellbore collapsing are induced.It is the first well drilled successfully with domestic white oil-based drilling fluid in Zigong Region.It also sets several new records including the deepest well,the shortest drilling cycle,and the fastest drilling speed in that region,which provides valuable experience for the future drilling activities. 展开更多
关键词 OIL-BASED drilling fluid DEMULSIFICATION Voltage RHEOLOGY fluid Loss Inhibition POLLUTION plugging
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Research and Application of Fuling Shale Gas Anti-Collapse and Anti-Leakage Drilling Fluid System 被引量:1
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作者 Baijing Wang Chunzhi Luo Yidi Wang 《Open Journal of Yangtze Oil and Gas》 2021年第2期60-71,共12页
Aiming at the problems of microfracture development in hard brittle shale gas layer in Fuling block, Chongqing, such as collapse of borehole wall and the existence of permeability loss of microfracture during drilling... Aiming at the problems of microfracture development in hard brittle shale gas layer in Fuling block, Chongqing, such as collapse of borehole wall and the existence of permeability loss of microfracture during drilling, and serious pollution of drilling environment with oil-based drilling fluid, a water-based drilling fluid system for anti-collapse and anti-leakage was studied. A water-based drilling fluid system with anti-collapse and anti-leakage was formed by introducing functional treatment agents, such as polypolysaccharide MEG, polymer emulsion film forming wall cementing agent LFGB, polyamine inhibitor LCFA and deformable particle plugging agent BXLZ, into the conventional water-based drilling fluid. After rolling at 130°C for 16 h, the system has good rheological properties, low filtration loss, good inhibition, lubrication and plugging properties. It has good plugging properties for 0.12 mm, 0.24 mm, 0.38 mm micro-cracks and 400 mD and 800 mD sand plates. The system was successfully tested on site in August 2019 in Fuling Reef Block, showing good rheological properties, solid wall plugging, and strong ability to seal and inhibit fracture expansion. There was no block falling in the drilling process, and the tripping, casing running and well cementing operations were all smooth, which provided a new technical idea and scheme for environmental protection and green drilling in Fuling shale gas exploitation. 展开更多
关键词 SHALE drilling fluid INHIBITION fluid Loss LUBRICITY plugging
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Research progress and prospect of plugging technologies for fractured formation with severe lost circulation 被引量:10
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作者 SUN Jinsheng BAI Yingrui +6 位作者 CHENG Rongchao LYU Kaihe LIU Fan FENG Jie LEI Shaofei ZHANG Jie HAO Huijun 《Petroleum Exploration and Development》 CSCD 2021年第3期732-743,共12页
By reviewing the mechanisms of drilling fluid lost circulation and its control in fractured formations, the applicability and working mechanisms of different kinds of lost circulation materials in plugging fractured f... By reviewing the mechanisms of drilling fluid lost circulation and its control in fractured formations, the applicability and working mechanisms of different kinds of lost circulation materials in plugging fractured formations have been summarized. Meanwhile, based on the types of lost circulation materials, the advantages, disadvantages, and application effects of corresponding plugging technologies have been analyzed to sort out the key problems existing in the current lost circulation control technologies. On this basis, the development direction of plugging technology for severe loss have been pointed out. It is suggested that that the lost circulation control technology should combine different disciplines such as geology, engineering and materials to realize integration, intelligence and systematization in the future. Five research aspects should be focused on:(1) the study on mechanisms of drilling fluid lost circulation and its control to provide basis for scientific selection of lost circulation material formulas, control methods and processes;(2) the research and development of self-adaptive lost circulation materials to improve the matching relationship between lost control materials and fracture scales;(3) the research and development of lost circulation materials with strong retention and strong filling in three-dimensional fracture space, to enhance the retention and filling capacities of materials in fractures and improve the lost circulation control effect;(4) the research and development of lost circulation materials with high temperature tolerance, to ensure the long-term plugging effect of deep high-temperature formations;(5) the study on digital and intelligent lost circulation control technology, to promote the development of lost circulation control technology to digital and intelligent direction. 展开更多
关键词 severe lost circulation lost circulation control mechanism lost circulation materials lost circulation control technology drilling fluid lost circulation plugging technologies progress
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Formation mechanisms of fracture plugging zone and optimization of plugging particles
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作者 LEI Shaofei SUN Jinsheng +5 位作者 BAI Yingrui LYU Kaihe ZHANG Shupei XU Chengyuan CHENG Rongchao LIU Fan 《Petroleum Exploration and Development》 CSCD 2022年第3期684-693,共10页
As formation mechanisms of plugging zone and criteria for fracture plugging remain unclear,plugging experiments and methods testing granular material mechanical properties are used to study the formation process of th... As formation mechanisms of plugging zone and criteria for fracture plugging remain unclear,plugging experiments and methods testing granular material mechanical properties are used to study the formation process of the plugging zone in fractured formations,analyze composition and ratios of different sizes of particles in the plugging zone,and reveal the essence and driving energy of the formation and damage of the plugging zone.New criteria for selecting lost circulation materials are proposed.The research results show that the formation of the plugging zone has undergone a process from inertial flow,elastic flow,to quasi-static flow.The plugging zone is composed of fracture mouth plugging particles,bridging particles and filling particles,and the proportion of the three types of particles is an important basis for designing drilling fluid loss control formula.The essence of the construction of the plugging zone is non-equilibrium Jamming phase transition.The response of the plugging zone particle system to pressure is driven by entropy force;the greater the entropy,the more stable the plugging zone.Lost circulation control formula optimized according to the new criteria has better plugging effect than the formula made according to conventional plugging rules and effectively improves the pressure-bearing capacity of the plugging zone.The research results provide a theoretical and technical basis for the lost circulation control of fractured formations. 展开更多
关键词 fractured formation drilling fluid loss plugging zone plugging mechanism plugging particles optimization criterion
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钻井利器的故事之“护壁堵漏材料” 被引量:2
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作者 王胜 欧兴贵 +4 位作者 解程超 袁长金 李之军 袁进科 谭慧静 《钻探工程》 2024年第3期157-161,共5页
近年来,作为入地最为关键手段的钻探所面临的地层越来越复杂,钻孔垮塌、掉块、缩径和超径等事故发生概率增加,严重制约了钻探工程质量与效率的提升。护壁堵漏材料是钻探工程不可或缺的关键性工程材料,护壁堵漏技术则是保证钻进工作安全... 近年来,作为入地最为关键手段的钻探所面临的地层越来越复杂,钻孔垮塌、掉块、缩径和超径等事故发生概率增加,严重制约了钻探工程质量与效率的提升。护壁堵漏材料是钻探工程不可或缺的关键性工程材料,护壁堵漏技术则是保证钻进工作安全、快速以及持续进行的重要技术环节,是复杂地层钻孔处理的主要内容。本文从科普的角度介绍了护壁堵漏材料的基本概念与组成、冲洗液护壁堵漏作用、水泥基材料护壁堵漏作用、护壁堵漏材料的进一步发展空间等,以期加深对护壁堵漏材料的认识,促进新型护壁堵漏材料的研发和应用。 展开更多
关键词 钻探工程 冲洗液 水泥基材料 护壁堵漏
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海上某盆地胶结型防漏堵漏钻井液技术 被引量:1
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作者 贺垠博 许杰 +4 位作者 崔国杰 张磊 林海 陈卓 金经洋 《钻井液与完井液》 CAS 北大核心 2024年第1期68-75,共8页
分析了我国海上某盆地地质特征和历史井漏情况,明确了该盆地钻井防漏堵漏难点:地层裂缝发育且存在微米级至毫米级的多尺度裂缝,甚至裂缝和孔、洞并存,导致堵漏材料选配难、一次堵漏成功率低;地层发育大段风化壳、部分地层破碎严重、钻... 分析了我国海上某盆地地质特征和历史井漏情况,明确了该盆地钻井防漏堵漏难点:地层裂缝发育且存在微米级至毫米级的多尺度裂缝,甚至裂缝和孔、洞并存,导致堵漏材料选配难、一次堵漏成功率低;地层发育大段风化壳、部分地层破碎严重、钻井中裂缝极易二次发育等,导致恶性漏失甚至失返性漏失等复杂情况。针对上述难点,以聚乙烯醇、聚丙烯酸以及含邻苯二酚结构的有机物为原料,合成了一种胶结型堵漏剂BFD-1。实验结果表明,人造疏松岩心在加有4%BFD-1的水溶液中浸泡后,岩心抗压强度提高率达19.34%。以BFD-1为核心,复配现场常用堵漏材料,构建了适用于不同尺寸范围漏失通道的防漏堵漏钻井液体系,具良好的防漏堵漏性、胶结性,并可有效阻止压力传递。研究成果可为该地区钻井井漏防治提供有力技术支撑。 展开更多
关键词 胶结 防漏堵漏 水基钻井液 堵漏材料
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复杂泥页岩地层井壁稳定钻井液材料研究现状 被引量:1
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作者 黄贤斌 张学皓 +1 位作者 袁侦航 张洋 《新疆石油天然气》 CAS 2024年第3期46-53,共8页
针对复杂泥页岩地层钻井过程中频繁出现的井壁失稳问题,目前国内外已形成了用于稳定井壁的钻井液技术,包括泥页岩水化抑制技术、地层孔隙封堵技术和化学固壁技术。但以上多种技术均无法抑制泥页岩的表面水化作用,高温条件下快速封堵和... 针对复杂泥页岩地层钻井过程中频繁出现的井壁失稳问题,目前国内外已形成了用于稳定井壁的钻井液技术,包括泥页岩水化抑制技术、地层孔隙封堵技术和化学固壁技术。但以上多种技术均无法抑制泥页岩的表面水化作用,高温条件下快速封堵和化学固壁剂的效果也相当有限,因此井壁失稳问题仍难以解决。系统总结了复杂泥页岩地层井壁稳定钻井液材料的研究工作,通过对井壁稳定钻井液材料研究现状进行分析,阐述了不同钻井液材料包括泥页岩水化抑制剂、封堵剂、化学固壁剂的作用机理,探讨了不同种类井壁稳定材料的优势和缺陷。据此指出开展泥页岩水化基础理论研究、开发高温高盐条件下稳定有效的新型纳米材料、建立能够模拟井下条件的化学固壁剂的评价方法将成为未来复杂泥页岩地层井壁稳定钻井液材料和技术研究的热点和难点。最后对复杂泥页岩地层井壁稳定钻井液技术和材料的发展方向进行了展望。 展开更多
关键词 泥页岩 井壁失稳 钻井液 页岩抑制剂 封堵剂 固壁剂
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钻井液用自适应堵漏材料的研制
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作者 夏海英 杨丽 陈智晖 《钻井液与完井液》 北大核心 2024年第6期742-746,共5页
针对堵漏过程中易漏地层特征掌握不准确,现场堵漏材料自适应能力差,易造成堵漏效果不佳和堵漏后发生重复性漏失的情况。通过可变形材料的优选,同时利用现有刚性堵漏材料的特点,研制出一种具有较好抗压能力和弹性的自适应堵漏材料,抗温达... 针对堵漏过程中易漏地层特征掌握不准确,现场堵漏材料自适应能力差,易造成堵漏效果不佳和堵漏后发生重复性漏失的情况。通过可变形材料的优选,同时利用现有刚性堵漏材料的特点,研制出一种具有较好抗压能力和弹性的自适应堵漏材料,抗温达170℃,69 MPa压力下可变形不破碎,压力去除后回弹率达80%,与钻井液配伍性好,形成的自适应堵漏配方能够对1~6 mm的变化缝宽形成有效封堵,漏失少,承压能力达6 MPa。 展开更多
关键词 堵漏材料 自适应 钻井液 承压能力
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改性二氧化硅封堵剂的制备及性能评价
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作者 党海锋 刘刚 《山东化工》 CAS 2024年第9期48-50,共3页
为了降低水基钻井液滤液对储层的扰动,以丙烯酰胺、苯乙烯、乙烯基三甲氧基硅烷对纳米SiO_(2)进行表面改性,将柔性链聚合物接枝在纳米刚性SiO_(2)粒子表面,形成一种新型的有机-无机复合封堵剂。实验结果发现:该封堵剂提高了泥饼的致密... 为了降低水基钻井液滤液对储层的扰动,以丙烯酰胺、苯乙烯、乙烯基三甲氧基硅烷对纳米SiO_(2)进行表面改性,将柔性链聚合物接枝在纳米刚性SiO_(2)粒子表面,形成一种新型的有机-无机复合封堵剂。实验结果发现:该封堵剂提高了泥饼的致密性和封堵性能,并对岩心孔隙进行了有效封堵,有效抑制岩屑水化现象,为水基钻井液在低渗-致密储层开发过程中的应用提供技术支持。 展开更多
关键词 封堵剂 水基钻井液 封堵性能 纳米二氧化硅 滤失量
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碳酸盐岩储层高酸溶多级架桥暂堵型钻井完井液体系
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作者 高伟 范胜 +3 位作者 齐彪 代昌楼 贾虎 牛骋程 《钻井液与完井液》 CAS 北大核心 2024年第5期589-602,共14页
以顺北二区碳酸盐岩储层为研究对象,通过岩心裂缝稳定性校正评价了储层敏感性,开展了现用钻井液伤害评价,明确了储层损害主控因素为应力敏感伤害和固相伤害,2种伤害因素累计占比达78.07%。采取“钻井可暂堵、完井可解堵”理念和保护微... 以顺北二区碳酸盐岩储层为研究对象,通过岩心裂缝稳定性校正评价了储层敏感性,开展了现用钻井液伤害评价,明确了储层损害主控因素为应力敏感伤害和固相伤害,2种伤害因素累计占比达78.07%。采取“钻井可暂堵、完井可解堵”理念和保护微裂缝为主的储层保护思路,根据裂缝架桥封堵理论,研选了高酸溶固相封堵材料耦合可降解纤维关键材料。通过抗温、抗盐抗钙、沉降稳定性、配伍性及储层保护性能评价,形成了耐高温180℃多级架桥储层保护钻井完井液体系,其承压超过10 MPa,酸化后渗透率恢复率均值可达96.86%,相对常规不含酸溶暂堵材料体系提高了16.23%,具有强封堵、高返排的特点,有望减轻顺北二区碳酸盐岩储层的损害。 展开更多
关键词 碳酸盐岩 微裂缝 稳定性校正 可酸溶 封堵 钻井完井液 超低伤害
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高分子纳米复合材料在水基钻井液中的研究进展
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作者 吴宇 侯珊珊 由福昌 《油田化学》 CAS CSCD 北大核心 2024年第3期543-552,共10页
传统高分子聚合物材料难以满足日益复杂的井下环境要求,而无机纳米材料又存在分散性不足的缺陷,将纳米材料接枝到聚合物链上或将聚合物嵌入纳米材料中形成高分子纳米复合材料,可发挥两种材料的协同增效作用,进而提升水基钻井液的综合性... 传统高分子聚合物材料难以满足日益复杂的井下环境要求,而无机纳米材料又存在分散性不足的缺陷,将纳米材料接枝到聚合物链上或将聚合物嵌入纳米材料中形成高分子纳米复合材料,可发挥两种材料的协同增效作用,进而提升水基钻井液的综合性能。文章介绍了高分子纳米复合材料在改善水基钻井液流变性、优化封堵降滤失性、增强封堵防塌性方面的应用,总结了其作用效果及作用机理。高分子纳米复合材料改善钻井液流变性的机理包括聚合物增强固体纳米颗粒在钻井液中的分散性、增加流体层间内摩擦力、通过聚合物与黏土颗粒之间的氢键和静电相互作用形成空间网络结构等。优化钻井液封堵降滤失性的机理包括利用无机纳米材料对微孔进行封堵,形成致密的泥饼,利用聚合物的强吸附性和两亲性,在泥饼表面形成疏水膜等。增强钻井液封堵防塌作用的机理包括纳米颗粒桥接和堵塞页岩纳米孔隙,形成致密屏障,阻止水分子侵入页岩;聚合物链上的多功能基团在黏土表面形成竞争吸附,降低黏土对水分子的吸附;成熟聚胺类聚合物的氨基嵌入和阳离子压缩双电层的综合作用,强化页岩水化抑制性能。提出了高分子纳米复合材料面临的挑战,如大规模生产过程中无机纳米颗粒在聚合物基质中可能出现的分散不均匀问题。最后,从降磨减阻、储层保护和可持续性3个方面对高分子纳米复合材料的研究方向进行了展望。 展开更多
关键词 高分子 纳米复合材料 水基钻井液 流变 降滤失 封堵防塌 综述
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塔里木山前盐底恶性漏失沉降堵漏技术
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作者 刘锋报 尹达 +2 位作者 魏天星 吴虹宇 王子午 《新疆石油天然气》 CAS 2024年第4期1-7,共7页
塔里木盆地山前普遍发育高压盐膏层和低压碎屑岩目的层,两套地层系统压差高于20 MPa,钻井过程中由于地质卡层不准极易造成钻穿盐膏层、进入目的层后发生恶性井漏事故。为解决塔里木山前盐底恶性井漏问题,在已知塔里木山前盐底恶性漏失... 塔里木盆地山前普遍发育高压盐膏层和低压碎屑岩目的层,两套地层系统压差高于20 MPa,钻井过程中由于地质卡层不准极易造成钻穿盐膏层、进入目的层后发生恶性井漏事故。为解决塔里木山前盐底恶性井漏问题,在已知塔里木山前盐底恶性漏失机理为高低压差地层钻穿连通造成的恶性漏失和“瓶塞”堵漏原理的基础上,通过评价堵漏材料的承压强度和高温下的沉降速度等性能参数,分别筛选出油基钻井液和水基钻井液沉降堵漏塞形成(速度和质量)的最佳条件,并最终形成一套高密度、大压差油基和水基钻井液专用的沉降堵漏技术。其中,当油基钻井液油水比50∶50、破乳电压(ES)在200~300V范围内,水基钻井液添加了0.2%XC、0.2%破胶剂和堵漏剂时,沉降塞形成效果最好。该沉降堵漏技术在塔里木山前成功试验3口井,其中在DB1302井上堵漏塞承压能力达30 MPa,说明盐底恶性漏失堵漏技术取得了显著的应用效果。 展开更多
关键词 塔里木盆地 山前盐底 恶性井漏 沉降堵漏 钻井液 深井超深井
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绒囊暂堵液堵漏机理研究
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作者 李延伟 《石化技术》 CAS 2024年第8期69-71,共3页
绒囊流体因其具有较好堵漏性能,广泛应用于钻完井、修井等石油工程勘探开发各个阶段。明确绒囊流体堵漏的微观机理可以更好的指导现场堵漏。室内测定了绒囊内绒囊的粒径分布、封堵岩心的孔喉分布及封堵压力,利用微观实验装置观测其基质... 绒囊流体因其具有较好堵漏性能,广泛应用于钻完井、修井等石油工程勘探开发各个阶段。明确绒囊流体堵漏的微观机理可以更好的指导现场堵漏。室内测定了绒囊内绒囊的粒径分布、封堵岩心的孔喉分布及封堵压力,利用微观实验装置观测其基质孔隙内的充填暂堵过程,最后结合理论分析明确绒囊流体微观堵漏机理。结果表明,体系内绒囊的粒径分布0~350 μm,岩心孔喉的粒径分布0.7~15 μm,同一绒囊流体封堵4种岩心封堵压5.42~17.65 MPa且随着渗透率的减小而增大,绒囊通过聚集、变形可对基质孔喉、微裂缝进行全面封堵。根据拉普拉斯定理结合室内实验结果可知,绒囊流体堵漏的微观机理为:岩心内的绒囊流体在流动过程中压缩变形产生了附加阻力,大量的附加阻力相互叠加产生了封堵压力,阻止了井漏的发生。 展开更多
关键词 钻完井 堵漏 绒囊流体 微观机理
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浅谈金坛储气库钻井提速提质技术
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作者 陈刚 杨正凯 《中国井矿盐》 2024年第1期9-10,14,共3页
金坛储气库已经钻井近20年,在钻进中存在漏失、盐层段井径扩大率高、砂砾石钻头磨损大等施工问题,导致钻井周期长、钻进时效低。针对金坛盐矿钻进中出现玄武岩漏失、阜宁组盐层易溶解、砂砾岩发育、直井轨迹控难、固井质量要求高等问题... 金坛储气库已经钻井近20年,在钻进中存在漏失、盐层段井径扩大率高、砂砾石钻头磨损大等施工问题,导致钻井周期长、钻进时效低。针对金坛盐矿钻进中出现玄武岩漏失、阜宁组盐层易溶解、砂砾岩发育、直井轨迹控难、固井质量要求高等问题,总结现有已钻井施工的问题,形成了防斜打直钻井技术、新型饱和盐水钻井液技术、防漏堵漏技术、防气窜固井技术等金坛矿区盐井钻井关键技术,为后续钻井的设计和施工提供新的思路。 展开更多
关键词 防斜打直钻井技术 新型饱和盐水钻井液技术 防漏堵漏技术 防气窜固井技术
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钻井液微纳米封堵性能评价方法研究进展 被引量:1
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作者 宋瀚轩 叶艳 +3 位作者 郑连杰 孙振玮 周童 张謦文 《应用化工》 CAS CSCD 北大核心 2024年第2期383-385,共3页
综述了国内外钻井液微纳米封堵性能的评价方法及发展动态,阐述了各评价方法的特点。并且对微纳米封堵评价方法的智能化、精确化发展进行了展望。为开发高效、智能、落地性强的微纳米封堵评价方法提供了新思路。
关键词 封堵性能评价 钻井液 纳米封堵
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铝土岩水平井快封堵防塌钻井液技术
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作者 贾俊 陈磊 +2 位作者 郝超 周文军 冯永兵 《钻井液与完井液》 CAS 北大核心 2024年第4期473-480,共8页
陇东铝土岩属于长庆油田重要的资源接替储层,近期完试的陇**井、宁**井在太原组铝土岩勘探获得重大突破。针对该类储层溶孔和裂缝发育,井壁垮塌、漏失风险高及井眼清洁能力差的技术难题,通过铝土岩物性参数、理化性能、力学性能和敏感... 陇东铝土岩属于长庆油田重要的资源接替储层,近期完试的陇**井、宁**井在太原组铝土岩勘探获得重大突破。针对该类储层溶孔和裂缝发育,井壁垮塌、漏失风险高及井眼清洁能力差的技术难题,通过铝土岩物性参数、理化性能、力学性能和敏感性测试分析等,明确了陇东铝土岩主要坍塌因素,研发出适用于铝土岩安全钻进的快封堵防塌钻井液技术。该体系在170℃高温高压滤失量小于10 mL,钻井液二次回收率大于91%,铝土岩样品在钻井液体系中浸泡15 d后和清水浸泡15 d后的抗压强度相比提升81.8%。快封堵防塌钻井液技术在长庆首口铝土岩水平井陇4**井进行了试验应用,助力该井700 m水平段的安全钻进,该井投产获日产无阻流量3.53×10^(6)m^(3)高产气流,创鄂尔多斯盆地上古生届勘探开发50多年新纪录,为该类储层的勘探开发提供了技术支撑。 展开更多
关键词 铝土岩 水平井 快封堵 防塌 钻井液
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我国钻井液技术难题、新进展及发展建议 被引量:11
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作者 孙金声 王韧 龙一夫 《钻井液与完井液》 CAS 北大核心 2024年第1期1-30,共30页
系统地梳理了超深/特深层、非常规、深水、干热岩、极地、天然气水合物等复杂地层钻探过程中面临的钻井液技术难题,探讨了关键科学问题与核心工程难题,结合近年来的钻井液技术进展,介绍了钻井液技术最新进展。针对复杂地层钻井过程中遇... 系统地梳理了超深/特深层、非常规、深水、干热岩、极地、天然气水合物等复杂地层钻探过程中面临的钻井液技术难题,探讨了关键科学问题与核心工程难题,结合近年来的钻井液技术进展,介绍了钻井液技术最新进展。针对复杂地层钻井过程中遇到的高温高压高盐、泥页岩水化严重、井壁失稳、大温差、井漏、储层损害,以及钻井液维护自动化程度低等问题,国内外学者研发了抗高温高盐水基/油基钻井液、恒流变钻井液、抗超高温泡沫钻井液、环境友好型超低温钻井液、智能温压响应承压堵漏材料、可降解储层保护材料、钻井液在线监测与自动加料系统等关键材料、体系与装备。但随着地质、工程环境愈加复杂,钻井液材料仍面临抗超高温高盐、超长时间稳定、防塌固壁、恶性漏失以及钻井液性能自动化调控等重大技术瓶颈。为满足复杂地层钻探过程中钻井液性能需求,未来还需深入研究钻井液处理剂在极端条件下的起效/失效机理,钻井液处理剂在微观-介观-宏观等不同尺度下的构效关系变化及作用机制,建立安全高效的钻井液多功能一体化调控方法,构建智能钻井液理论与技术,为实现复杂地层安全高效经济环保钻井提供关键技术支撑。 展开更多
关键词 钻井液 超深/特深层 非常规地下资源 防漏堵漏 储层保护 钻井液性能调控
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